package jdbc2作业;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

public class LoginDemo {
    public static void main(String[] args) {
        System.out.println("欢迎登录");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = sc.nextLine();
        System.out.println("请输入密码");
        String password = sc.nextLine();

        try (Connection connection = DBUtil.getConnection();) {
            Statement statement = connection.createStatement();

            String sql = "SELECT id,username,password,nickname,age " +
                    "FROM user" +
                    //筛选条件是判断用户名username和密码 password
                    "WHERE username='" + username + "' AND password='" + password + "'";

            System.out.println(sql);
            ResultSet rs = statement.executeQuery(sql);
            if (rs.next()) {
                System.out.println("登录成功");
            } else {
                System.out.println("登录失败");
            }

            } catch(SQLException e){
                throw new RuntimeException(e);
            }
        }
    }